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@ait-eh gisten gaitrnt @fitta IMPROVBD SKYLIGHT.

' faits tage-bute maar tu in tlgese titters "atcut nur mating riz-itt nt tlg-c smite.

l TO ALL WHOM I'l MAY CONCERN:

Be it lmpwn that I. HORACE WESTON, of Boston, in the county of Suii'olk, and State of Massachusetts, have invented certain improvements in Skylights for Buildings, &c., of which the following is a full, clear, and exact description, reference being' had to the accompanying drawings, making part ot' this specification, in whioh Figure 1 is a plan of the sash of. a skylight having my improvements applied thereto.

Figure 2 is a transverse section on the line :I: :v of iig. 1.

Figure 3 is a longitudinal section on the line y y of iig. 1.

Figure 4 is a transverse section .of one of the bars of the skylight.

With the ordinary skylight sash as at present constructed, as soon as the putty which confines the glass becomes cracked and loosened, the water is'admitted and runs down the bars on the inside into the room or apartment, frequently causing much damage'. l

My invention has for its object to overcome this diiliclily, and consists in forming a groove or gutter on eamo-h side of the bars andiat the sides of the sash below the shoulder on which the `edge of the glass rests, so thatany water which may pass through will fall into the grooves and be conducted outside; and my invention also consists in so cutting away o1' forming the upper surface of the bottom rail of the sash, that any moisture which may collect on the inner surface of the glass will run down and be conducted into the grooves, and thence pass outside instead of dropping down, as has heretofore been the case.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it ont.

In the said drawings, A is the sash of the skylight, and B B the bars which support the glass, C. These bars (which extend down to thc bottom of the sash) are of the form in cross-section shown in figs. 2 and 4, being provided with a groove or gutter, a, on each side beneath the shoulder b, on which the edge o f the glass rests; and it will be seen that inthe event of the putty becoming cracked and loosened, any Water which may pass through between the bars andthe glass will fall down into the gutters a and be conductedoutside the building at the points 5 instead of falling into the apartment. A similar groove, c, is also formed at eachside of the sash, so as to lead the water away at these points. The lower portions'of the grooves a c, communicating with the external ail', also form openings which serve to ventilato the apartment. `The bottomrail, D, of the sash, is cut away at d, leaving spaces, c, between the glass and the rail, as seen in figs. 2 and 3, so that any moisture which may collect on the inner surface of the glass will run down, and striking the inclined edges (i, be conducted into the grooves 'a c, whence it will pass ont as before described, instead of dropping into the apartment, as would be the case if theglass came in contact with the upper edge 7 of the rail D, as is the ease in the ordinary sashes no'w in use. i p

My improvements may be applied to woioden sashes, or to those formed of mtal, being particularly woll adapted for the latter, where the putty soon\becomes cracked a;.d loosened from the expansion .and contraction of the metal, caused by variations ofthe temperature. VA sash constructed as above described may be furnished at a moderat-e cost, andwill entirely vprevent water from passing through into the apartment, thus avoiding the liability of damage from this causeb-an event of not unfrequent occurrence with sashes as at present constructed.

Claim. What I claim as my invention, and desire to secure by Letters Patent as an improvement in sashes for skylights, is

Forming grooves or gutters avc in the bars B, and 'at the sides of the sash, substantially as and for the Apurpose described.

I also claim so forming or cutting away the upper surface of the bottom rail-D, that the moisture will run down into the grooves a c, substantially as set fort-h.

HORACE WESTON.

Witnesses:

P. E. TEsonnMAennn, Y N. W. STEARNS. 

